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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
REFUEL STATION SEE A
FUELING POWER
FUELING SWITCH
NOZZLE
RECEPTACLE DOOR CLOSED LATCH
WINGREFUEL LEADING
EDGE SEE B PANEL, P15
DOOR
OPEN
ACCESS DOOR
LATCH FOR THE REFUEL STATIONCAP SAFETY CHAIN
PANEL FWD
LIGHT
REFUEL STATION
A
VALVE POSITION LIGHTS
TEST
GAGES &
bb b
FUELING
TEST TANK No.2 CENTER TANK TANK No.1 GAGES OPEN OPEN OPEN
OFF
CLOSED CLOSED CLOSED AUX FUELING POWER CONTROL
REFUEL QUANTITY INDICATOR (3 LOCATIONS)
REFUEL PANEL, P15
B
Refuel Station Component Location
Figure 201
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 492-019
(6) Connect the bonding cable on the defueling hose to the ground jack on the wing.
NOTE: The bonding cable is not necessary if there is electrical
____
continuity between the nozzle and the receptacle.
S 492-020
(7)
Connect defueling hose nozzle to the fueling receptacle.
S 862-002
(8)
Open the shutoff handle on the defueling hose nozzle.
NOTE: The defueling nozzle must have a filter screen.
____
S 862-021
(9)
Make sure the two engine shutoff valves are closed.
S 862-022
(10)
Make sure the switches for the fueling shutoff valves on the P15 panel are in the CLOSED position.
S 862-003
(11)
Make sure the valve position lights are off.
S 972-023
(12)
Make sure you know the correct quantity of fuel in the tanks.
(a)
Write the fuel quantity for the tank or the tanks that you are scheduled to defuel.
(b)
Hold the test switch on the P15 panel in the TEST GAGES position for one second.
(c)
The valve shown on the indicator must decrease.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
(d)
Release the switch.
(e)
Make sure the indicator goes back to its initial value with these tolerances: 1) AIRPLANES WITH ANALOG INDICATORS;
| 50 pounds (| 25 kilograms) 2) AIRPLANES WITH DIGITAL INDICATORS; | 10 pounds (| 10 kilograms).
S 012-024
(13)
Open the access door, 6535, for the defueling valve (Fig. 202).
S 862-004
(14)
Open the defueling valve.
S 862-025
(15)
Set the crossfeed valve control on the P5 panel to open the crossfeed valve.
NOTE: If you are scheduled to defuel the No. 2 tank (right side),
____ it is not necessary to open or to close the crossfeed valve.
(a) Make sure the valve position light is dim (blue).
S 862-219
(16) On the P5 panel, set the switches for the fuel boost pumps to the positions shown in this table:
~............................................................................... | | SWITCH POSITION FOR DEFUELING | | .......................................... | FUEL BOOST PUMP SWITCH | TANK NO. 1 | TANK NO. 2 | CENTER TANK | .................................................................................
| FUEL PUMPS AFT 1 | ON | OFF | OFF |
| FUEL PUMPS FWD 1 | ON | OFF | OFF |
| FUEL PUMPS AFT 2 | OFF | ON | OFF |
| FUEL PUMPS FWD 2 | OFF | ON | OFF |
| FUEL PUMPS L CTR | OFF | OFF | ON |
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